Finding the Third Proportional to 31,411.88 and 67,744.31

Step by Step Solution

1. Step 1: Write the proportion equation
   31,411.88 : 67,744.31 = 67,744.31 : x
2. Step 2: Convert to fraction form
   31,411.88/67,744.31 = 67,744.31/x
3. Step 3: Cross multiply
   31,411.88x = 67,744.31 × 67,744.31
4. Step 4: Simplify right side
   31,411.88x = 4,589,291,876.10
5. Step 5: Solve for x
   x = 4,589,291,876.10/31,411.88
6. Step 6: Final answer
   x = 146,100.54